1220204000 has 192 divisors, whose sum is σ = 3167760960. Its totient is φ = 461260800.

The previous prime is 1220203987. The next prime is 1220204009. The reversal of 1220204000 is 4020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220204009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7771922 + ... + 7772078.

It is an arithmetic number, because the mean of its divisors is an integer number (16498755).

Almost surely, 2^1220204000 is an apocalyptic number.

1220204000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220204000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1583880480).

1220204000 is an abundant number, since it is smaller than the sum of its proper divisors (1947556960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220204000 is a wasteful number, since it uses less digits than its factorization.

1220204000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1220204000 is about 34931.4185225851. The cubic root of 1220204000 is about 1068.5892842244.

Adding to 1220204000 its reverse (4020221), we get a palindrome (1224224221).

The spelling of 1220204000 in words is "one billion, two hundred twenty million, two hundred four thousand".